import java.util.ArrayList;
import java.util.List;

public class Solution1291 {

    int[] t=new int[]{12,23,34,45,56,67,78,89,123,234,345,456,567,678,789,1234,2345,3456,4567,5678,6789,12345,23456,34567,45678,56789,123456,234567,345678,456789,1234567,2345678,3456789,12345678,23456789,123456789};

    public List<Integer> sequentialDigits(int low, int high) {
        List<Integer> list=new ArrayList<>();
        for (int i : t) {
            if (low<=i && i<=high){
                list.add(i);
            }
        }
        return list;
    }

    public static void main(String[] args) {
        System.out.println(new Solution1291().sequentialDigits(100,300));
    }
}
